\left\{ \begin{array} { l } { x + y = 9 } \\ { x = 7 } \end{array} \right.
Solve for x, y
x=7
y=2
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\left\{ \begin{array} { l } { x + y = 9 } \\ { x = 7 } \end{array} \right.
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7+y=9
Consider the first equation. Insert the known values of variables into the equation.
y=9-7
Subtract 7 from both sides.
y=2
Subtract 7 from 9 to get 2.
x=7 y=2
The system is now solved.
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